Science Museum Oklahoma is a science museum in Oklahoma City, Oklahoma. The museum is home to the Kirkpatrick Planetarium, the International Gymnastics Hall of Fame and a number of specialized galleries. The facility covers over 390,000 square feet, which makes it one of the largest science museums in the nation. It began as the Kirkpatrick Planetarium in 1958 with major additions in 1980, 1985, 2000, and 2007.